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Financial Instruments and Risk Management (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |  |  |  |  | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Sep. 28, 2013 Location State gal | Sep. 29, 2012 gal | Sep. 28, 2013 7.5% Senior Notes due October 1, 2018 [Member] | Sep. 28, 2013 7.375% Senior Notes due March 15, 2020 [Member] | Sep. 28, 2013 7.375% Senior Notes due August 1, 2021 [Member] | Sep. 28, 2013 Customer Concentration Risk [Member] Revenues [Member] | Sep. 29, 2012 Customer Concentration Risk [Member] Revenues [Member] | Sep. 24, 2011 Customer Concentration Risk [Member] Revenues [Member] | Sep. 28, 2013 Supplier Concentration Risk [Member] Propane Purchases [Member] | Sep. 28, 2013 Supplier Concentration Risk [Member] Propane Purchases [Member] Inergy Services [Member] | Sep. 28, 2013 Supplier Concentration Risk [Member] Propane Purchases [Member] Targa Liquids Marketing and Trade [Member] | Sep. 28, 2013 Derivatives Not Designated as Hedging Instruments [Member] | Sep. 29, 2012 Derivatives Not Designated as Hedging Instruments [Member] | Sep. 28, 2013 Derivatives Not Designated as Hedging Instruments [Member] Commodity-Related Derivatives [Member] | Sep. 29, 2012 Derivatives Not Designated as Hedging Instruments [Member] Commodity-Related Derivatives [Member] | Sep. 28, 2013 Derivatives Not Designated as Hedging Instruments [Member] Commodity-Related Derivatives [Member] Other Current Assets [Member] | Sep. 29, 2012 Derivatives Not Designated as Hedging Instruments [Member] Commodity-Related Derivatives [Member] Other Current Assets [Member] | Sep. 28, 2013 Derivatives Not Designated as Hedging Instruments [Member] Commodity-Related Derivatives [Member] Other Assets [Member] | Sep. 29, 2012 Derivatives Not Designated as Hedging Instruments [Member] Commodity-Related Derivatives [Member] Other Assets [Member] | Sep. 28, 2013 Derivatives Not Designated as Hedging Instruments [Member] Commodity-Related Derivatives [Member] Other Current Liabilities [Member] | Sep. 29, 2012 Derivatives Not Designated as Hedging Instruments [Member] Commodity-Related Derivatives [Member] Other Current Liabilities [Member] | Sep. 28, 2013 Derivatives Not Designated as Hedging Instruments [Member] Commodity-Related Derivatives [Member] Other Liabilities [Member] | Sep. 29, 2012 Derivatives Not Designated as Hedging Instruments [Member] Commodity-Related Derivatives [Member] Other Liabilities [Member] | Sep. 28, 2013 Derivatives Designated as Hedging Instruments [Member] Interest Rate Swaps [Member] | Sep. 29, 2012 Derivatives Designated as Hedging Instruments [Member] Interest Rate Swaps [Member] | Sep. 28, 2013 Derivatives Designated as Hedging Instruments [Member] Interest Rate Swaps [Member] Other Current Liabilities [Member] | Sep. 29, 2012 Derivatives Designated as Hedging Instruments [Member] Interest Rate Swaps [Member] Other Current Liabilities [Member] | Sep. 28, 2013 Derivatives Designated as Hedging Instruments [Member] Interest Rate Swaps [Member] Other Liabilities [Member] | Sep. 29, 2012 Derivatives Designated as Hedging Instruments [Member] Interest Rate Swaps [Member] Other Liabilities [Member]
Derivative Instruments and Hedging Activities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Propane Gallons |  | 44,531 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average maturity of outstanding commodity-related derivatives | 5 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value - assets |  |  |  |  |  |  |  |  |  |  |  | $ 3,262 | $ 5,133 |  |  | $ 2,546 | $ 4,523 | $ 716 | $ 610 |  |  |  |  |  |  |  |  |  |
Fair value - liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  | 430 | 8,742 |  |  |  |  | 430 | 8,720 | 0 | 22 | 2,428 | 5,477 | 1,307 | 2,430 | 1,121 | 3,047
Reconciliation of beginning and ending balances of assets measured at fair value on recurring basis using significant unobservable inputs [Rollforward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance of over-the-counter options | 5,002 | 1,780 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance realized during the period | (4,400) | (1,168) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in the fair value of beginning balance | (580) | 1,059 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contracts purchased during the period | 1,825 | 3,331 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance of over-the-counter options | 1,847 | 5,002 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reconciliation of beginning and ending balances of liabilities measured at fair value on recurring basis using significant unobservable inputs [Rollforward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance of over-the-counter options | 1,209 | 118 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance realized during the period | (1,182) | (49) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in the fair value of beginning balance | (27) | 120 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contracts purchased during the period | 0 | 1,020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance of over-the-counter options | 0 | 1,209 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentrations [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of locations served by the Partnership | 750 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of states which the Partnership operates | 41 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum concentration risk threshold accounted for by a single customer or supplier (in hundredths) |  |  |  |  |  | 10.00% | 10.00% | 10.00% | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration percentage of propane supply provided by suppliers (in hundredths) |  |  |  |  |  |  |  |  |  | 34.00% | 12.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Senior Notes |  |  | $ 533,799 | $ 268,125 | $ 372,143 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Minimum concentration threshold accounted for by a single entity or an aggregate of entities expressed as a percentage as of the balance sheet date. The threshold serves as a benchmark which may include, but not limited to, customers, suppliers, geography or any other designation. + References No definition available. + Details
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